Modified octahedral shelter



FIG. 1 is an elevation view of a modified octahedral shelter showing the design;

FIG. 2 is an elevation view one side of the modified octahedral shelter, the other side being identical;

FIG. 3 is an elevation view of the modified octahedral shelter from the back;

FIG. 4 is a top view of the modified octahedral shelter. 

The ornamental design for a modified octahedral shelter, as shown and described. 